Your problem will be with channel 4 which is rudder by default. You will need to create a mix that nulls this channel out (Make 4 both master & slave). Then you can mix the correct control back to this channel.

This might help. As Heather points out, you will need to use the channel 4 as one of the flaps channel (instead of ch7 as described in the below link). Setup ch4 to have ZERO travel (so the movement of rudder stick won't affect it) and then mix it as you would mix in ch7... But you have to adjust travel so its zero (this doesn't affect movement for mixes)

This might help. As Heather points out, you will need to use the channel 4 as one of the flaps channel (instead of ch7 as described in the below link). Setup ch4 to have ZERO travel (so the movement of rudder stick won't affect it) and then mix it as you would mix in ch7... But you have to adjust travel so its zero (this doesn't affect movement for mixes)

I did mix rudder to itself to cancel the rudder stick movement but when I mix flaps from channel 7 to channel 4 it doesn't move the channel, I can get it to do this for the other channels but it's like 4 is a master channel and it won't let me mix to it.

I am able to mix the whole thing so I have flaps and speedbrakes on switch C using the Acro programing but doing it this way my crow is not on a slider or throttle stick and variable.

I'd like to use the Glider-C programing and mix 7 to 4 so I can have crow variable and then put two position flaps on swith C.

I did mix rudder to itself to cancel the rudder stick movement but when I mix flaps from channel 7 to channel 4 it doesn't move the channel, I can get it to do this for the other channels but it's like 4 is a master channel and it won't let me mix to it.

I am able to mix the whole thing so I have flaps and speedbrakes on switch C using the Acro programing but doing it this way my crow is not on a slider or throttle stick and variable.

I'd like to use the Glider-C programing and mix 7 to 4 so I can have crow variable and then put two position flaps on swith C.

Thanks!

Can you mix 7 to 4 if you don't cancel out the rudder as you have done?

If you can mix 7 to 4 with rudder enabled, try to cancel out the rudder stick movement with rudder travel adjust.